See title. First time I've ever run into this problem. First, it won't even download on my JBed iPad. So I downloaded to my iTunes on my MBP, then transferred it over. Upon launching, it always gives me this error, then crashes. Tried deleting the app, then re-downloading it, no go. Also tried killing iBooks app icon in the app switch bar at the bottom, then re-launching it, no go, either. I am as yet to do a tethered reboot. Has anyone here had this problem?